1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Leokris [45]
3 years ago
7

Calculate the work done when a force of 500N moves an object 20m. and (B) if it

Chemistry
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:

work done = force multiplied by distance covered,which is 500n multiplied by 20 m= 10000nm

power= work done/time

p= 10000/10

p=1000

You might be interested in
Using the equations 2 Sr(s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol SrO (s) + CO₂ (g) → SrCO₃ (s) ∆H° = -234 kJ/mol CO₂ (g) → C(
kkurt [141]

<u>Answer:</u> The \Delta H^o_{rxn} for the reaction is 72 kJ.

<u>Explanation:</u>

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

2SrCO_3(s)\rightarrow 2Sr(s)+2C(s)+3O_2(g)      \Delta H^o_{rxn}=?

The intermediate balanced chemical reaction are:

(1) 2Sr(s)+O_2(g)\rightarrow 2SrO(s)    \Delta H_1=-1184kJ

(2) SrO(s)+CO_2(g)\rightarrow SrCO_3(s)     \Delta H_2=-234kJ      ( × 2)

(3) CO_2(g)\rightarrow C(s)+O_2(g)     \Delta H_3=394kJ    ( × 2)

The expression for enthalpy of the reaction follows:

\Delta H^o_{rxn}=[1\times (\Delta H_1)]+[2\times (-\Delta H_2)]+[2\times (\Delta H_3)]

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-1184))+(2\times -(-234))+(2\times (394))]=72kJ

Hence, the \Delta H^o_{rxn} for the reaction is 72 kJ.

4 0
3 years ago
How many moles of carbon dioxide can be formed by the decomposition of 5.0 moles of aluminium carbonate
Ksenya-84 [330]

Answer:

30 moles of CO₂

Explanation:

3 0
2 years ago
An atom has 5 protons and 7 neutrons. What is its mass number?
lisabon 2012 [21]
Mass number = protons + neutrons
mass number = 5 + 7
mass number = 12
3 0
3 years ago
Read 2 more answers
What is the main function of the circulatory system?
likoan [24]
B- is the answer


Hope this helps


Have a nice day~
4 0
3 years ago
Read 2 more answers
What would be the formula of the precipitate that forms when pb(no3)2 (aq) and k2so4 (aq) are mixed?
maria [59]
The formula of the ppt. formed is PbSo4 , which is inslouble.
6 0
3 years ago
Other questions:
  • 2.822 mol of nickel has _________ atoms of nickel.<br><br> (Enter just the number for this one.)
    6·1 answer
  • Here is the science paper
    6·1 answer
  • How can you tell pizza is a mixture
    14·2 answers
  • The sodium content of twenty 300-gram boxes of organic cornflakes was determined. The data (in milligrams) are as follows: 131.1
    11·1 answer
  • According to the ideal gas law for a fixed amount of gas, if the _____ is constant, then when the ________ increases the volume
    8·1 answer
  • What would be the final temperature of a 73.174g sample
    12·1 answer
  • How are mixtures and solutions different from each other?
    5·1 answer
  • Whats the formula for mass
    12·1 answer
  • During a phase change, such as melting or boiling, the kinetic energy __. Highlight correct answer
    13·1 answer
  • Which option is a physical property of matter?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!